Years before diag, I found that I could find errors in visual patterns quite easily, so I wrote a little game to practice the theory.
Nobody else that I asked to play it could, to any reasonable degree, but I don't think any of the people I asked were also Aspies.
So, if you're a pattern recogniser, I've put the game online at:
http://emptyfortress.com
-There are no ads and I make nothing from it, besides knowing that other Aspies might possibly now enjoy playing it.
Also, I reiterate that I wrote the game a few years ago and I'm not working on it now, so if you find a bug, or it won't run, or it makes you dropkick your computer then I apologise, but that won't change any time soon.
Those caveats in place, Click around, see what everything does, and fix patterns.
Just click the tiles that you think are incorrect.
If you don't like the mosaic you're playing, click the button in the top left to generate a new one, OR enter any word or string into the Name field just to the right of it. Anybody else can play the game and enter that same word to get the same mosaic with the same errors.
As you get better the mosaics grow more complex. Also, the better you are, the more damage you do to surrounding tiles when you make a mistake.
You can toggle colour/monochrome with the triple dot button in the top right.
Think that's everything. Hope you enjoy =]